BIMI checker
Use this BIMI checker to read your BIMI record, the DMARC policy it depends on, the SVG logo and the mark certificate. Each problem comes with the fix.
Free, no account. Ten checks per hour, shared by our DKIM, blacklist, MTA-STS and BIMI checkers.
Email deliverability checks
Check the sending identity, domain policy, receiving servers and an actual received message together. These checks explain configuration; they cannot certify delivery to an inbox.
- SPF
- Authorize your sending IP and trace the DNS lookup budget.
- DMARC / DKIM
- Check policy, alignment settings, reporting permissions and public keys.
- MX
- Inspect incoming servers, addresses, reverse DNS and the public blocklist.
- Email headers
- Read actual receiver results, forwarding assertions and hop delays locally.
- DKIM
- Read the public key for a selector, or try common provider selectors.
- Blocklists
- Check mail server addresses on DNS blocklists, with removal steps.
- MTA-STS
- Check the TLS policy for incoming mail, its MX match and TLS reports.
- BIMI
- Check the BIMI record, the SVG logo, the certificate and DMARC readiness.
Google and Yahoo bulk sender requirements
Requirements checked 2026-10-12. Google applies its bulk rules above 5000 messages per day to personal Gmail accounts. Yahoo describes bulk senders without publishing the same numeric threshold.
- Publish SPF and sign with DKIM. Publish DMARC with at least p=none, and align the visible From domain with a passing SPF or DKIM identity.
- Use valid forward and reverse DNS and correctly formatted messages. Google also requires TLS transport. Keep reported spam rates below 0.3 percent.
- Marketing and subscribed messages need one-click unsubscribe headers plus a visible unsubscribe link. Honor unsubscribe requests within two days.
- Google requires RSA DKIM keys of at least 1024 bits and recommends 2048 bits. A DNS key check does not prove that outgoing mail is signed.
Spam rate, unsubscribe behavior and real SMTP TLS are outside a DNS check. Verify them with your mail service and a received message.
Google sender guidelinesYahoo sender requirementsYahoo bulk sender definition
A BIMI checker tests whether a domain meets the published requirements for showing its logo in inboxes. It reads the BIMI record, checks that DMARC is at quarantine or reject, fetches the SVG logo to test the SVG Tiny PS rules and size, and reads the VMC or CMC certificate. Mailbox providers still decide whether to show the logo.
How to use this checker
- Enter your domain
- Use the domain in your From address. We read default._bimi, or the selector you enter, and fall back to the main domain’s record for a subdomain.
- Meet the DMARC requirement
- BIMI needs DMARC at p=quarantine or p=reject, with pct at 100 and no sp=none. We read the DMARC record and say what stands in the way.
- Check the logo and certificate
- The logo must be an SVG Tiny PS file over HTTPS: square, self-contained and at most 32 KB. We fetch it and the certificate in a=, then check the dates, the domain names and the BIMI usage.
Questions about this checker
Check your business in AI answers
Email records protect your name in the inbox. The free AI visibility scan shows how ChatGPT and other assistants describe your business.